6...fxg4 7.Nxg4! Qxf4 8.Qxe4+! Qxe4 9.Bxe4+ Kg8 10.Bg3 with a big advantage – Trifunovic.
Now the e4-pawn has become weak, besides which Black has a constant problem with the passive knight on a6.
By this and his next move Black again directs all his attention to the d4-square.